EP0433231B1 - Dispositif pour former une colonne d'articles en particulier de barres de chocolat - Google Patents

Dispositif pour former une colonne d'articles en particulier de barres de chocolat Download PDF

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Publication number
EP0433231B1
EP0433231B1 EP90810946A EP90810946A EP0433231B1 EP 0433231 B1 EP0433231 B1 EP 0433231B1 EP 90810946 A EP90810946 A EP 90810946A EP 90810946 A EP90810946 A EP 90810946A EP 0433231 B1 EP0433231 B1 EP 0433231B1
Authority
EP
European Patent Office
Prior art keywords
belt
belts
feed
articles
slide
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP90810946A
Other languages
German (de)
English (en)
Other versions
EP0433231A1 (fr
Inventor
Harald Lenherr
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Schweizerische Industrie Gesellschaft
Original Assignee
Schweizerische Industrie Gesellschaft
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Schweizerische Industrie Gesellschaft filed Critical Schweizerische Industrie Gesellschaft
Publication of EP0433231A1 publication Critical patent/EP0433231A1/fr
Application granted granted Critical
Publication of EP0433231B1 publication Critical patent/EP0433231B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G21/00—Supporting or protective framework or housings for endless load-carriers or traction elements of belt or chain conveyors
    • B65G21/10—Supporting or protective framework or housings for endless load-carriers or traction elements of belt or chain conveyors movable, or having interchangeable or relatively movable parts; Devices for moving framework or parts thereof
    • B65G21/14—Supporting or protective framework or housings for endless load-carriers or traction elements of belt or chain conveyors movable, or having interchangeable or relatively movable parts; Devices for moving framework or parts thereof to allow adjustment of length or configuration of load-carrier or traction element
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G43/00—Control devices, e.g. for safety, warning or fault-correcting
    • B65G43/08—Control devices operated by article or material being fed, conveyed or discharged
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G47/00—Article or material-handling devices associated with conveyors; Methods employing such devices
    • B65G47/22—Devices influencing the relative position or the attitude of articles during transit by conveyors
    • B65G47/26—Devices influencing the relative position or the attitude of articles during transit by conveyors arranging the articles, e.g. varying spacing between individual articles
    • B65G47/30—Devices influencing the relative position or the attitude of articles during transit by conveyors arranging the articles, e.g. varying spacing between individual articles during transit by a series of conveyors
    • B65G47/31—Devices influencing the relative position or the attitude of articles during transit by conveyors arranging the articles, e.g. varying spacing between individual articles during transit by a series of conveyors by varying the relative speeds of the conveyors forming the series
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G2203/00—Indexing code relating to control or detection of the articles or the load carriers during conveying
    • B65G2203/04—Detection means
    • B65G2203/042—Sensors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G2203/00—Indexing code relating to control or detection of the articles or the load carriers during conveying
    • B65G2203/04—Detection means
    • B65G2203/042—Sensors
    • B65G2203/044—Optical

Definitions

  • a device for forming a column of piece goods is known from DE-A-27 11 039.
  • This document shows a revolving feed belt and a revolving discharge belt, each of which is guided at the end of the transport route via stationary guide rollers. At the transfer point between the two belts, these are guided over deflection rollers which are mounted on a carriage which can be moved back and forth in the transport direction.
  • the carriage also carries second deflection rollers arranged at a distance from these first deflection rollers.
  • the slide is moved back and forth by a constantly rotating cam. In this way, groups of these bars are formed from chocolate bars delivered on the feed belt at regular intervals, which bars are then fed to a packaging machine. Because the moveable second deflection rollers must have a relatively large distance from each other, which is of the order of half of the total conveyor distance, the maximum slide stroke is relatively small.
  • DE-A-36 30 791 describes a device with which a regularly formed row can be formed from a row of objects with an irregular spacing.
  • this device requires at least three conveyor belts with at least two transitions that can be moved back and forth in the transport direction, and a cyclical switching on and off of the three belts.
  • the control is therefore complicated and time-consuming, and because of the switching on and off, the transport performance is relatively modest.
  • Objects are delivered at irregular intervals on a feed conveyor belt and transferred to a discharge conveyor belt at a transfer point located on a carriage.
  • the removal conveyor is stopped to form groups of regularly spaced objects. Every time an object passes the transfer point, the carriage is moved by a certain amount against the conveying direction of the feed belt. If a predetermined number of objects are accumulated on the discharge belt, this group is activated by switching on the discharge belt Discharged in one go and then moved the sledge back to its starting position.
  • This device also works relatively slowly because of the cyclical operation. It is only suitable for forming relatively short groups of objects.
  • the present invention is based on the object of developing a device of the type mentioned at the outset according to DE-A-1 456 521 in such a way that, with high transport performance, a continuous row with constant distances can be formed from objects continuously delivered at irregular intervals. This object is achieved by the combination of features of claim 1.
  • the device according to FIG. 1 is connected between a production machine, not shown, in which chocolate bars are produced, for example, and a packaging machine, also not shown. It comprises an endless, circumferential supply belt 1 and an adjoining, endless, circumferential discharge belt 2.
  • the upper, horizontal runs 3, 4 of these belts 1, 2 run in the transport direction 5 and are delimited by a stationary deflection roller 6, 7 on the upstream or downstream end of the device and two deflection rollers 9, 10 rotatably mounted directly next to one another on a slide 8.
  • the space between the rollers 9, 10 forms the transfer point 11 between the belts 1, 2.
  • the slide 8 is on a rail 12 in the transport direction 5 guided back and forth.
  • the belts 1, 2 each wrap around a drive roller 16, 17, which are each driven by a motor 18, 19.
  • the output shafts of the two motors 18, 19 each drive a tachometer 20, 21.
  • the belts 1, 2 are also each around two further, fixedly mounted deflection rollers 22, 24 or 23, 25 and one roller 26, 27 mounted on the slide 8 guided.
  • the belts 1, 2 each form one between the rollers 22, 24 and 23, 25, respectively Loop 28, 29.
  • the loops 28, 29 are each tensioned by a deflection roller 30, 31.
  • the deflection rollers 30, 31 are rotatably mounted on a second, lower carriage 32, which can be moved back and forth on a second rail 33 in the transport direction 5.
  • a light barrier 50 is fastened on the carriage 8 by means of a carrier 49, each of which emits a signal at its output 53 when the trailing edge 51 of a chocolate bar 52 running through the upper run 3 of the feed belt 1 passes.
  • the output 53 is connected to one of the inputs of a controller 54.
  • the other inputs of the controller 54 are to the Outputs of the three tachometers 20, 21, 41 connected.
  • An output 55 of the controller 54 controls the speed and direction of rotation of the servo motor 40.
  • a second output 56 of the controller 54 controls the speed of one of the motors 18, 19, in the illustrated embodiment of the motor 19.
  • the feed belt 1 as well as the discharge belt 2 consists of two parallel parallel conveyor belts 60 which slide on the support bodies 45.
  • the purpose of this is that the chocolate bars have two defined support points and not e.g. if the bar shape is irregular, just rest in the middle and therefore be able to twist easily.
  • a recess 61 on the top of the support body 45 serves the same purpose.
  • the support body 45 has on its underside a groove 62 in which the toothed belt 44 is positioned.
  • the support body 45 is fastened to the belt 44 by means of a plate 63 which engages in the toothing of the belt 44 and two screws 64.
  • the feed belt 1 is driven by the motor 16 at a constant speed v 1.
  • the discharge belt 2 is driven v2 by the motor 17 at a lower speed.
  • the rear edges 51 b , 51 c , 51 d transported on the discharge belt 2 Chocolate bars 52 b , 52 c , 52 d have a constant distance a from one another. In the starting position shown, the rear edge 51 b of the rearmost of these bars 52 b is at the transfer point 11.
  • the measurement signals of the tachometers 20, 21 are therefore used.
  • the measurement signal of the tachometer 41 serves as feedback in the servo circuit.
  • the carriage speed V3 is maintained until the trailing edge 51 has reached the transfer point 11 a, which is the case after a period of time that v1 of the speed difference - v2 and depends on (ca). After this time, the carriage 8 moves again with the speed v2 to the right until the light barrier 50 the passage of the next Trailing edge 51 reports.
  • the sledge movements should be balanced on average.
  • it is necessary that the speed difference v 1 - v 2 is adjusted to the average distance of the bars from one another on the feed belt 1.
  • This adaptation can be derived either from the signals from the sensor 50 or from the middle position of the carriage 8 and thus the speed of one of the motors 18, 19, in the exemplary embodiment of the motor 19 shown.
  • limit switches 68, 69 which are actuated by the carriage 32.
  • the device described enables a large stroke of the slide 8 for a given overall length and a high conveying speed. Because of the support of the upper runs 3, 4 by the support body 45, vertical vibrations of the belts 1, 2 are avoided even at very high sled accelerations, because the upper runs 3, 4 of these belts 1, 2 do not sag. For a given stroke length of the carriage 8, the device is considerably shorter than known devices for the same purpose.
  • the band 2 Because the chocolate bars 52 are braked at the transition to the band 2, it is expedient to provide the band 2 with a non-slip surface so that the braking distance of the bar 52 on the band 2 is short and scatters little.
  • Fig. 4 shows such an embodiment, wherein analog parts are provided with the same reference numerals, so that a description of these parts is unnecessary.
  • the carriage 32 is connected to the piston rod 70 of a hydraulic cylinder unit 71.
  • the cylinder 71 is controlled by a servo valve 72, which in turn is controlled by the controller 54 '.
  • the piston stroke is measured by an LDT 73 linear transducer.
  • a second light barrier 50a is attached to the carrier 49 above the transfer point 11. Its output 53a provides a signal when the rear edge 51 of a bolt 52 passes the transfer 11.
  • Fig. 5 shows an embodiment of the controller 54 'for controlling the servo valve 72 and the servo motor 21.
  • the distance c between successive bolts 52 is determined by integrating the signal of the tachometer 20 between two successive signals of the light barrier 50 by means of an integrator 75.
  • the output of the integrator 75 is read into a sample & hold circuit 76 and the integrator 75 is reset to zero.
  • the output of the circuit 76 is read into a second sample & hold circuit 77 in response to a signal from the light barrier 50a.
  • the output of the circuit 77 corresponds to the distance c between the rear edge 51a of the bolt 52a and which is to be moved on the belt 1 to the transfer point 11 the rear edge 51b of the next front bar 52b at the point in time at which it is just leaving the transfer point 11.
  • the desired distance a between the bars 52 on the belt 2 is set using a potentiometer 78.
  • Two multipliers 79, two differential amplifiers 80 and a dividing element 81 carry out the equation entered in this element 81 and thus determine the target value v 3r of the carriage speed.
  • the actual value v 3a is determined by differentiating the signal of the transducer 73 using a differentiator 82. These two speeds are subtracted in a servo amplifier 83 which drives the servo valve 72.
  • the position signal of the transducer 73 is integrated with an integrator 84 with a large time constant.
  • the output of the integrator 84 corresponds to the mean value of the position of the two slides 8, 32.
  • This output is the setpoint input of a further servo amplifier 85 which drives the servo motor 19.
  • the feedback of the actual value to the amplifier 85 is the signal from the tachometer 21.
  • the integrator 84 regulates the speed of the discharge conveyor belt 2 as a function of the average distance c between the bars 52 on the feed belt 1 such that the two slides 8, 32 are around their central position to move back and fourth.
  • the second light barrier 50a can also be omitted.
  • the read-in signal for the circuit 77 is derived from the signal of the light barrier 50 via a dead time element.
  • the dead time is inversely proportional to the belt speed v 1.
  • the controller 54 ' is shown with an analog circuit. However, the same function can also be carried out with a digital circuit.
  • the controller 54 'according to FIG. 5 is also suitable for the embodiment according to FIG. 1.
  • the transducer 73 and the differentiator 82 are replaced by the tachometer 41
  • the integrator 84 carries out a double integration
  • the servo amplifier 83 drives it Servo motor 40.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Conveyors (AREA)
  • Confectionery (AREA)
  • Structure Of Belt Conveyors (AREA)
  • Intermediate Stations On Conveyors (AREA)
  • Attitude Control For Articles On Conveyors (AREA)

Claims (10)

  1. Dispositif pour former une colonne de produits unitaires, notamment de barres de chocolat, comprenant une bande transporteuse d'alimentation (1), circulant en permanence à une première vitesse (v₁) et sur laquelle arrivent les produits unitaires (52) se succédant individuellement dans la direction de transport (5), une bande transporteuse d'évacuation (2), circulant en permanence à une seconde vitesse (v₂), se raccordant directement à l'extrémité aval de la bande transporteuse d'alimentation (1) et prenant en charge les produits unitaires (52) de la bande transporteuse d'alimentation (1) pour les amener à un poste de traitement ultérieur, un premier coulisseau (8), mobile en va-et-vient dans la direction de transport (5) et portant un élément de renvoi de bande respectif (9, 10) pour les deux bandes transporteuses (1, 2), les deux éléments de renvoi de bande (9, 10) constituant le point de transfert (11) entre les deux bandes transporteuses (1, 2), une poulie de bande transporteuse respective (6, 7), montée stationnairement à chaque extrémité du parcours de transport total et par laquelle passe la bande transporteuse (1, 2) concernée, un second coulisseau (32), mobile en va-et-vient dans la direction de transport à l'encontre de la direction de déplacement du premier coulisseau (8) et portant une poulie de renvoi respective (30, 31) pour les deux bandes transporteuses (1, 2), un servoentraînement (40, 71, 72), agissant dans les deux directions et dont l'organe de sortie est relié à au moins un des deux coulisseaux, un régulateur (54), qui entraîne le servoentraînement (40, 71, 72), ainsi qu'un capteur (50), qui est relié au régulateur (54) et détecte les produits unitaires (52) en amont du point de transfert (11).
  2. Dispositif selon la revendication 1, dans lequel le capteur (50) est fixé sur le premier coulisseau (8).
  3. Dispositif selon la revendication 1 ou 2, dans lequel le servoentraînement (40, 71, 72) est en outre régulé en fonction des vitesses de la bande transporteuse d'alimentation et de la bande transporteuse d'évacuation (1, 2).
  4. Dispositif selon l'une quelconque des revendications 1 à 3, dans lequel la différence de vitesses entre la bande transporteuse d'alimentation (1) et la bande transporteuse d'évacuation (2) peut être réglée en fonction de la distance moyenne entre les produits unitaires (52) sur la bande transporteuse d'alimentation (1).
  5. Dispositif selon l'une quelconque des revendications 1 à 4, dans lequel le premier coulisseau (8) est fixé sur le tronçon supérieur (42) d'un élément de traction flexible (44), circulant autour de deux disques (38, 39) montés stationnairement.
  6. Dispositif selon la revendication 5, dans lequel des éléments de soutien (45) sont disposés à distance les uns des autres sur l'élément de traction (44), éléments sur lesquels sont soutenus les tronçons supérieurs (3, 4) de la bande transporteuse d'alimentation et de la bande transporteuse d'évacuation (1, 2), les éléments de soutien (45) étant de préférence réalisés en matière plastique, notamment en polyamide.
  7. Dispositif selon la revendication 5 ou 6, dans lequel le premier disque (38) est disposé au voisinage de l'extrémité amont du tronçon supérieur (3) de la bande transporteuse d'alimentation (1), et l'autre disque (39) au voisinage de l'extrémité aval du tronçon supérieur (4) de la bande transporteuse d'évacuation (2).
  8. Dispositif selon l'une quelconque des revendications 5 à 7, dans lequel l'élément de traction (44) est une courroie dentée.
  9. Dispositif selon l'une quelconque des revendications 1 à 8, dans lequel la bande transporteuse d'alimentation et la bande transporteuse d'évacuation (1, 2) sont chacune constituées de deux bandes transporteuses (60) disposées à distance l'une de l'autre.
  10. Dispositif selon les revendications 6 et 9, dans lequel les éléments de soutien (45) présentent un évidement (61) dans la région située entre les bandes transporteuses (60).
EP90810946A 1989-12-08 1990-12-04 Dispositif pour former une colonne d'articles en particulier de barres de chocolat Expired - Lifetime EP0433231B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH4423/89 1989-12-08
CH442389 1989-12-08

Publications (2)

Publication Number Publication Date
EP0433231A1 EP0433231A1 (fr) 1991-06-19
EP0433231B1 true EP0433231B1 (fr) 1993-11-10

Family

ID=4275862

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90810946A Expired - Lifetime EP0433231B1 (fr) 1989-12-08 1990-12-04 Dispositif pour former une colonne d'articles en particulier de barres de chocolat

Country Status (4)

Country Link
US (1) US5322154A (fr)
EP (1) EP0433231B1 (fr)
JP (1) JP3245746B2 (fr)
DE (1) DE59003462D1 (fr)

Cited By (1)

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US5322154A (en) 1994-06-21
JPH03211113A (ja) 1991-09-13
EP0433231A1 (fr) 1991-06-19
DE59003462D1 (de) 1993-12-16
JP3245746B2 (ja) 2002-01-15

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